Iskra MT 511 User Manual page 30

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3.10.3 Pulse output module
A corresponding energy counter can be assigned to a pulse output. A number of pulses per energy unit,
pulse length, and a tariff in which output is active are set.
WARNING!
Pulse parameters are defined by SIST EN 62053−31 standard. In chapter Calculation of
recommended pulse parameters, below a simplified rule is described to assist you in setting
the pulse output parameters.
The pulse module can also function as an alarm output with limited current load (max. 20 mA).
Calculation of recommended pulse parameters
Number of pulses per energy unit should be in certain limits according to expected power. If not so the
measurement from pulse output can be incorrect. Settings of current and voltage transformers can help
in estimation of expected power.
Principle described below for pulse setting, where e is prefix, satisfies SIST EN 62053−31: 2001 standards
pulse specifications:


1 5 , 15 eW 100 p 1 eWh
Examples:
Expected power
150 − 1500 kW
1.5 − 15 MW
15 − 150 MW
150 − 1500 MW
3.10.4 Digital input module
No setting. General purpose digital input can be used for various alarms function.
3.10.5 Watchdog output module
The purpose is to detect potential malfunction of transducer or auxiliary power supply failure. This
module can be set for normal operation (relay in close position) or for test purposes to open position
(manual activation). After test module should be set back to normal operation.

Pulse output settings

1 p/1 kWh

100 p/1 MWh

10 p/1 MWh

1 p/1 MWh
SETTINGS
User's Manual